blob: af8244b1c1f428dab026544802ca951089a02fd1 [file] [log] [blame]
srinivas pandruvada401ca242012-09-05 13:56:00 +01001/*
2 * HID Sensors Driver
3 * Copyright (c) 2012, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 */
19#include <linux/device.h>
20#include <linux/hid.h>
srinivas pandruvada401ca242012-09-05 13:56:00 +010021#include <linux/module.h>
22#include <linux/slab.h>
23#include <linux/mfd/core.h>
24#include <linux/list.h>
25#include <linux/hid-sensor-ids.h>
26#include <linux/hid-sensor-hub.h>
27#include "hid-ids.h"
28
Srinivas Pandruvada875e36f2014-01-14 09:30:20 -080029#define HID_SENSOR_HUB_ENUM_QUIRK 0x01
30
srinivas pandruvada401ca242012-09-05 13:56:00 +010031/**
32 * struct sensor_hub_pending - Synchronous read pending information
33 * @status: Pending status true/false.
34 * @ready: Completion synchronization data.
35 * @usage_id: Usage id for physical device, E.g. Gyro usage id.
36 * @attr_usage_id: Usage Id of a field, E.g. X-AXIS for a gyro.
37 * @raw_size: Response size for a read request.
38 * @raw_data: Place holder for received response.
39 */
40struct sensor_hub_pending {
41 bool status;
42 struct completion ready;
43 u32 usage_id;
44 u32 attr_usage_id;
45 int raw_size;
46 u8 *raw_data;
47};
48
49/**
50 * struct sensor_hub_data - Hold a instance data for a HID hub device
51 * @hsdev: Stored hid instance for current hub device.
52 * @mutex: Mutex to serialize synchronous request.
53 * @lock: Spin lock to protect pending request structure.
54 * @pending: Holds information of pending sync read request.
55 * @dyn_callback_list: Holds callback function
56 * @dyn_callback_lock: spin lock to protect callback list
57 * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance.
58 * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached).
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -080059 * @ref_cnt: Number of MFD clients have opened this device
srinivas pandruvada401ca242012-09-05 13:56:00 +010060 */
61struct sensor_hub_data {
srinivas pandruvada401ca242012-09-05 13:56:00 +010062 struct mutex mutex;
63 spinlock_t lock;
64 struct sensor_hub_pending pending;
65 struct list_head dyn_callback_list;
66 spinlock_t dyn_callback_lock;
67 struct mfd_cell *hid_sensor_hub_client_devs;
68 int hid_sensor_client_cnt;
Srinivas Pandruvada875e36f2014-01-14 09:30:20 -080069 unsigned long quirks;
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -080070 int ref_cnt;
srinivas pandruvada401ca242012-09-05 13:56:00 +010071};
72
73/**
74 * struct hid_sensor_hub_callbacks_list - Stores callback list
75 * @list: list head.
76 * @usage_id: usage id for a physical device.
77 * @usage_callback: Stores registered callback functions.
78 * @priv: Private data for a physical device.
79 */
80struct hid_sensor_hub_callbacks_list {
81 struct list_head list;
82 u32 usage_id;
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -080083 struct hid_sensor_hub_device *hsdev;
srinivas pandruvada401ca242012-09-05 13:56:00 +010084 struct hid_sensor_hub_callbacks *usage_callback;
85 void *priv;
86};
87
srinivas pandruvada401ca242012-09-05 13:56:00 +010088static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
89 int dir)
90{
91 struct hid_report *report;
92
93 list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
94 if (report->id == id)
95 return report;
96 }
97 hid_warn(hdev, "No report with id 0x%x found\n", id);
98
99 return NULL;
100}
101
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800102static int sensor_hub_get_physical_device_count(struct hid_device *hdev)
srinivas pandruvada401ca242012-09-05 13:56:00 +0100103{
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800104 int i;
105 int count = 0;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100106
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800107 for (i = 0; i < hdev->maxcollection; ++i) {
108 struct hid_collection *collection = &hdev->collection[i];
109 if (collection->type == HID_COLLECTION_PHYSICAL)
110 ++count;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100111 }
112
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800113 return count;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100114}
115
116static void sensor_hub_fill_attr_info(
117 struct hid_sensor_hub_attribute_info *info,
Srinivas Pandruvada9f740ff2013-11-27 22:19:00 +0000118 s32 index, s32 report_id, struct hid_field *field)
srinivas pandruvada401ca242012-09-05 13:56:00 +0100119{
120 info->index = index;
121 info->report_id = report_id;
Srinivas Pandruvada9f740ff2013-11-27 22:19:00 +0000122 info->units = field->unit;
123 info->unit_expo = field->unit_exponent;
124 info->size = (field->report_size * field->report_count)/8;
125 info->logical_minimum = field->logical_minimum;
126 info->logical_maximum = field->logical_maximum;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100127}
128
129static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
130 struct hid_device *hdev,
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800131 u32 usage_id,
132 int collection_index,
133 struct hid_sensor_hub_device **hsdev,
134 void **priv)
srinivas pandruvada401ca242012-09-05 13:56:00 +0100135{
136 struct hid_sensor_hub_callbacks_list *callback;
137 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
138
139 spin_lock(&pdata->dyn_callback_lock);
140 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800141 if (callback->usage_id == usage_id &&
142 (collection_index >=
143 callback->hsdev->start_collection_index) &&
144 (collection_index <
145 callback->hsdev->end_collection_index)) {
srinivas pandruvada401ca242012-09-05 13:56:00 +0100146 *priv = callback->priv;
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800147 *hsdev = callback->hsdev;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100148 spin_unlock(&pdata->dyn_callback_lock);
149 return callback->usage_callback;
150 }
151 spin_unlock(&pdata->dyn_callback_lock);
152
153 return NULL;
154}
155
156int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
157 u32 usage_id,
158 struct hid_sensor_hub_callbacks *usage_callback)
159{
160 struct hid_sensor_hub_callbacks_list *callback;
161 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
162
163 spin_lock(&pdata->dyn_callback_lock);
164 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800165 if (callback->usage_id == usage_id &&
166 callback->hsdev == hsdev) {
srinivas pandruvada401ca242012-09-05 13:56:00 +0100167 spin_unlock(&pdata->dyn_callback_lock);
168 return -EINVAL;
169 }
Dan Carpenter2b7c4b82012-09-14 06:53:23 +0000170 callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100171 if (!callback) {
172 spin_unlock(&pdata->dyn_callback_lock);
173 return -ENOMEM;
174 }
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800175 callback->hsdev = hsdev;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100176 callback->usage_callback = usage_callback;
177 callback->usage_id = usage_id;
178 callback->priv = NULL;
179 list_add_tail(&callback->list, &pdata->dyn_callback_list);
180 spin_unlock(&pdata->dyn_callback_lock);
181
182 return 0;
183}
184EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
185
186int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
187 u32 usage_id)
188{
189 struct hid_sensor_hub_callbacks_list *callback;
190 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
191
192 spin_lock(&pdata->dyn_callback_lock);
193 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800194 if (callback->usage_id == usage_id &&
195 callback->hsdev == hsdev) {
srinivas pandruvada401ca242012-09-05 13:56:00 +0100196 list_del(&callback->list);
197 kfree(callback);
198 break;
199 }
200 spin_unlock(&pdata->dyn_callback_lock);
201
202 return 0;
203}
204EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
205
206int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
207 u32 field_index, s32 value)
208{
209 struct hid_report *report;
Andy Shevchenko5902fde2013-08-14 11:07:09 +0300210 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100211 int ret = 0;
212
srinivas pandruvada401ca242012-09-05 13:56:00 +0100213 mutex_lock(&data->mutex);
214 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
Andy Shevchenko5902fde2013-08-14 11:07:09 +0300215 if (!report || (field_index >= report->maxfield)) {
srinivas pandruvada401ca242012-09-05 13:56:00 +0100216 ret = -EINVAL;
217 goto done_proc;
218 }
219 hid_set_field(report->field[field_index], 0, value);
Benjamin Tissoiresd88142722013-02-25 11:31:46 +0100220 hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
Benjamin Tissoiresb7966a42013-02-25 11:31:47 +0100221 hid_hw_wait(hsdev->hdev);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100222
223done_proc:
224 mutex_unlock(&data->mutex);
225
226 return ret;
227}
228EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
229
230int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
231 u32 field_index, s32 *value)
232{
233 struct hid_report *report;
Andy Shevchenko5902fde2013-08-14 11:07:09 +0300234 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100235 int ret = 0;
236
srinivas pandruvada401ca242012-09-05 13:56:00 +0100237 mutex_lock(&data->mutex);
238 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
Jiri Kosina4e5a4942013-09-06 11:59:53 +0200239 if (!report || (field_index >= report->maxfield) ||
Kees Cook9e891022013-08-28 22:31:44 +0200240 report->field[field_index]->report_count < 1) {
srinivas pandruvada401ca242012-09-05 13:56:00 +0100241 ret = -EINVAL;
242 goto done_proc;
243 }
Benjamin Tissoiresd88142722013-02-25 11:31:46 +0100244 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
Benjamin Tissoiresb7966a42013-02-25 11:31:47 +0100245 hid_hw_wait(hsdev->hdev);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100246 *value = report->field[field_index]->value[0];
247
248done_proc:
249 mutex_unlock(&data->mutex);
250
251 return ret;
252}
253EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
254
255
256int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
257 u32 usage_id,
258 u32 attr_usage_id, u32 report_id)
259{
Andy Shevchenko5902fde2013-08-14 11:07:09 +0300260 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100261 unsigned long flags;
262 struct hid_report *report;
263 int ret_val = 0;
264
srinivas pandruvada401ca242012-09-05 13:56:00 +0100265 mutex_lock(&data->mutex);
266 memset(&data->pending, 0, sizeof(data->pending));
267 init_completion(&data->pending.ready);
268 data->pending.usage_id = usage_id;
269 data->pending.attr_usage_id = attr_usage_id;
270 data->pending.raw_size = 0;
271
272 spin_lock_irqsave(&data->lock, flags);
273 data->pending.status = true;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100274 spin_unlock_irqrestore(&data->lock, flags);
Srinivas Pandruvadaf74346a2014-03-24 16:25:04 -0700275 report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
276 if (!report)
277 goto err_free;
278
279 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100280 wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
281 switch (data->pending.raw_size) {
282 case 1:
283 ret_val = *(u8 *)data->pending.raw_data;
284 break;
285 case 2:
286 ret_val = *(u16 *)data->pending.raw_data;
287 break;
288 case 4:
289 ret_val = *(u32 *)data->pending.raw_data;
290 break;
291 default:
292 ret_val = 0;
293 }
294 kfree(data->pending.raw_data);
295
296err_free:
297 data->pending.status = false;
298 mutex_unlock(&data->mutex);
299
300 return ret_val;
301}
302EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
303
Srinivas Pandruvadae02cee42014-01-23 18:50:21 -0800304int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
305 u32 report_id, int field_index, u32 usage_id)
306{
307 struct hid_report *report;
308 struct hid_field *field;
309 int i;
310
311 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
312 if (!report || (field_index >= report->maxfield))
313 goto done_proc;
314
315 field = report->field[field_index];
316 for (i = 0; i < field->maxusage; ++i) {
317 if (field->usage[i].hid == usage_id)
318 return field->usage[i].usage_index;
319 }
320
321done_proc:
322 return -EINVAL;
323}
324EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
325
srinivas pandruvada401ca242012-09-05 13:56:00 +0100326int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
327 u8 type,
328 u32 usage_id,
329 u32 attr_usage_id,
330 struct hid_sensor_hub_attribute_info *info)
331{
332 int ret = -1;
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800333 int i;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100334 struct hid_report *report;
335 struct hid_field *field;
336 struct hid_report_enum *report_enum;
337 struct hid_device *hdev = hsdev->hdev;
338
339 /* Initialize with defaults */
340 info->usage_id = usage_id;
Andy Shevchenko5902fde2013-08-14 11:07:09 +0300341 info->attrib_id = attr_usage_id;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100342 info->report_id = -1;
343 info->index = -1;
344 info->units = -1;
345 info->unit_expo = -1;
346
srinivas pandruvada401ca242012-09-05 13:56:00 +0100347 report_enum = &hdev->report_enum[type];
348 list_for_each_entry(report, &report_enum->report_list, list) {
349 for (i = 0; i < report->maxfield; ++i) {
350 field = report->field[i];
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800351 if (field->maxusage) {
352 if (field->physical == usage_id &&
353 (field->logical == attr_usage_id ||
354 field->usage[0].hid ==
355 attr_usage_id) &&
356 (field->usage[0].collection_index >=
357 hsdev->start_collection_index) &&
358 (field->usage[0].collection_index <
359 hsdev->end_collection_index)) {
360
361 sensor_hub_fill_attr_info(info, i,
362 report->id,
363 field);
364 ret = 0;
365 break;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100366 }
367 }
srinivas pandruvada401ca242012-09-05 13:56:00 +0100368 }
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800369
srinivas pandruvada401ca242012-09-05 13:56:00 +0100370 }
371
srinivas pandruvada401ca242012-09-05 13:56:00 +0100372 return ret;
373}
374EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
375
376#ifdef CONFIG_PM
377static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
378{
Andy Shevchenko5902fde2013-08-14 11:07:09 +0300379 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100380 struct hid_sensor_hub_callbacks_list *callback;
381
382 hid_dbg(hdev, " sensor_hub_suspend\n");
383 spin_lock(&pdata->dyn_callback_lock);
384 list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
385 if (callback->usage_callback->suspend)
386 callback->usage_callback->suspend(
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800387 callback->hsdev, callback->priv);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100388 }
389 spin_unlock(&pdata->dyn_callback_lock);
390
391 return 0;
392}
393
394static int sensor_hub_resume(struct hid_device *hdev)
395{
Andy Shevchenko5902fde2013-08-14 11:07:09 +0300396 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100397 struct hid_sensor_hub_callbacks_list *callback;
398
399 hid_dbg(hdev, " sensor_hub_resume\n");
400 spin_lock(&pdata->dyn_callback_lock);
401 list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
402 if (callback->usage_callback->resume)
403 callback->usage_callback->resume(
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800404 callback->hsdev, callback->priv);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100405 }
406 spin_unlock(&pdata->dyn_callback_lock);
407
408 return 0;
409}
410
411static int sensor_hub_reset_resume(struct hid_device *hdev)
412{
413 return 0;
414}
415#endif
Andy Shevchenko5902fde2013-08-14 11:07:09 +0300416
srinivas pandruvada401ca242012-09-05 13:56:00 +0100417/*
418 * Handle raw report as sent by device
419 */
420static int sensor_hub_raw_event(struct hid_device *hdev,
421 struct hid_report *report, u8 *raw_data, int size)
422{
423 int i;
424 u8 *ptr;
425 int sz;
426 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
427 unsigned long flags;
428 struct hid_sensor_hub_callbacks *callback = NULL;
429 struct hid_collection *collection = NULL;
430 void *priv = NULL;
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800431 struct hid_sensor_hub_device *hsdev = NULL;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100432
433 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
434 report->id, size, report->type);
435 hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
436 if (report->type != HID_INPUT_REPORT)
437 return 1;
438
439 ptr = raw_data;
Andy Shevchenko15261f62013-08-14 11:07:08 +0300440 ptr++; /* Skip report id */
srinivas pandruvada401ca242012-09-05 13:56:00 +0100441
srinivas pandruvada401ca242012-09-05 13:56:00 +0100442 spin_lock_irqsave(&pdata->lock, flags);
443
444 for (i = 0; i < report->maxfield; ++i) {
srinivas pandruvada401ca242012-09-05 13:56:00 +0100445 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
446 i, report->field[i]->usage->collection_index,
447 report->field[i]->usage->hid,
Srinivas Pandruvadad4b1bba2013-10-26 10:04:09 -0700448 (report->field[i]->report_size *
449 report->field[i]->report_count)/8);
450 sz = (report->field[i]->report_size *
451 report->field[i]->report_count)/8;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100452 if (pdata->pending.status && pdata->pending.attr_usage_id ==
453 report->field[i]->usage->hid) {
454 hid_dbg(hdev, "data was pending ...\n");
Andy Shevchenko7b0692f2013-08-14 11:07:11 +0300455 pdata->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
456 if (pdata->pending.raw_data)
Andy Shevchenko5902fde2013-08-14 11:07:09 +0300457 pdata->pending.raw_size = sz;
Andy Shevchenko7b0692f2013-08-14 11:07:11 +0300458 else
srinivas pandruvada401ca242012-09-05 13:56:00 +0100459 pdata->pending.raw_size = 0;
460 complete(&pdata->pending.ready);
461 }
462 collection = &hdev->collection[
463 report->field[i]->usage->collection_index];
464 hid_dbg(hdev, "collection->usage %x\n",
465 collection->usage);
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800466
467 callback = sensor_hub_get_callback(hdev,
468 report->field[i]->physical,
469 report->field[i]->usage[0].collection_index,
470 &hsdev, &priv);
471
srinivas pandruvada401ca242012-09-05 13:56:00 +0100472 if (callback && callback->capture_sample) {
473 if (report->field[i]->logical)
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800474 callback->capture_sample(hsdev,
srinivas pandruvada401ca242012-09-05 13:56:00 +0100475 report->field[i]->logical, sz, ptr,
476 callback->pdev);
477 else
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800478 callback->capture_sample(hsdev,
srinivas pandruvada401ca242012-09-05 13:56:00 +0100479 report->field[i]->usage->hid, sz, ptr,
480 callback->pdev);
481 }
482 ptr += sz;
483 }
484 if (callback && collection && callback->send_event)
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800485 callback->send_event(hsdev, collection->usage,
srinivas pandruvada401ca242012-09-05 13:56:00 +0100486 callback->pdev);
487 spin_unlock_irqrestore(&pdata->lock, flags);
488
srinivas pandruvada401ca242012-09-05 13:56:00 +0100489 return 1;
490}
491
Srinivas Pandruvada1df3a402013-09-18 18:13:00 +0100492int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
493{
494 int ret = 0;
495 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
496
497 mutex_lock(&data->mutex);
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800498 if (!data->ref_cnt) {
Srinivas Pandruvada1df3a402013-09-18 18:13:00 +0100499 ret = hid_hw_open(hsdev->hdev);
500 if (ret) {
501 hid_err(hsdev->hdev, "failed to open hid device\n");
502 mutex_unlock(&data->mutex);
503 return ret;
504 }
505 }
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800506 data->ref_cnt++;
Srinivas Pandruvada1df3a402013-09-18 18:13:00 +0100507 mutex_unlock(&data->mutex);
508
509 return ret;
510}
511EXPORT_SYMBOL_GPL(sensor_hub_device_open);
512
513void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
514{
515 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
516
517 mutex_lock(&data->mutex);
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800518 data->ref_cnt--;
519 if (!data->ref_cnt)
Srinivas Pandruvada1df3a402013-09-18 18:13:00 +0100520 hid_hw_close(hsdev->hdev);
521 mutex_unlock(&data->mutex);
522}
523EXPORT_SYMBOL_GPL(sensor_hub_device_close);
524
Srinivas Pandruvada875e36f2014-01-14 09:30:20 -0800525static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
526 unsigned int *rsize)
527{
528 int index;
529 struct sensor_hub_data *sd = hid_get_drvdata(hdev);
530 unsigned char report_block[] = {
531 0x0a, 0x16, 0x03, 0x15, 0x00, 0x25, 0x05};
532 unsigned char power_block[] = {
533 0x0a, 0x19, 0x03, 0x15, 0x00, 0x25, 0x05};
534
535 if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) {
536 hid_dbg(hdev, "No Enum quirks\n");
537 return rdesc;
538 }
539
540 /* Looks for power and report state usage id and force to 1 */
541 for (index = 0; index < *rsize; ++index) {
542 if (((*rsize - index) > sizeof(report_block)) &&
543 !memcmp(&rdesc[index], report_block,
544 sizeof(report_block))) {
545 rdesc[index + 4] = 0x01;
546 index += sizeof(report_block);
547 }
548 if (((*rsize - index) > sizeof(power_block)) &&
549 !memcmp(&rdesc[index], power_block,
550 sizeof(power_block))) {
551 rdesc[index + 4] = 0x01;
552 index += sizeof(power_block);
553 }
554 }
555
556 return rdesc;
557}
558
srinivas pandruvada401ca242012-09-05 13:56:00 +0100559static int sensor_hub_probe(struct hid_device *hdev,
560 const struct hid_device_id *id)
561{
562 int ret;
563 struct sensor_hub_data *sd;
564 int i;
565 char *name;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100566 int dev_cnt;
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800567 struct hid_sensor_hub_device *hsdev;
568 struct hid_sensor_hub_device *last_hsdev = NULL;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100569
Andy Shevchenko905cc192013-08-14 11:07:10 +0300570 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100571 if (!sd) {
572 hid_err(hdev, "cannot allocate Sensor data\n");
573 return -ENOMEM;
574 }
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800575
srinivas pandruvada401ca242012-09-05 13:56:00 +0100576 hid_set_drvdata(hdev, sd);
Srinivas Pandruvada875e36f2014-01-14 09:30:20 -0800577 sd->quirks = id->driver_data;
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800578
srinivas pandruvada401ca242012-09-05 13:56:00 +0100579 spin_lock_init(&sd->lock);
580 spin_lock_init(&sd->dyn_callback_lock);
581 mutex_init(&sd->mutex);
582 ret = hid_parse(hdev);
583 if (ret) {
584 hid_err(hdev, "parse failed\n");
Andy Shevchenko905cc192013-08-14 11:07:10 +0300585 return ret;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100586 }
srinivas pandruvada401ca242012-09-05 13:56:00 +0100587 INIT_LIST_HEAD(&hdev->inputs);
588
srinivas pandruvada401ca242012-09-05 13:56:00 +0100589 ret = hid_hw_start(hdev, 0);
590 if (ret) {
591 hid_err(hdev, "hw start failed\n");
Andy Shevchenko905cc192013-08-14 11:07:10 +0300592 return ret;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100593 }
srinivas pandruvada401ca242012-09-05 13:56:00 +0100594 INIT_LIST_HEAD(&sd->dyn_callback_list);
595 sd->hid_sensor_client_cnt = 0;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100596
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800597 dev_cnt = sensor_hub_get_physical_device_count(hdev);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100598 if (dev_cnt > HID_MAX_PHY_DEVICES) {
599 hid_err(hdev, "Invalid Physical device count\n");
600 ret = -EINVAL;
Srinivas Pandruvada1df3a402013-09-18 18:13:00 +0100601 goto err_stop_hw;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100602 }
603 sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt *
604 sizeof(struct mfd_cell),
605 GFP_KERNEL);
606 if (sd->hid_sensor_hub_client_devs == NULL) {
Axel Linf2f13a62012-09-19 16:30:00 +0100607 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
srinivas pandruvada401ca242012-09-05 13:56:00 +0100608 ret = -ENOMEM;
Srinivas Pandruvada1df3a402013-09-18 18:13:00 +0100609 goto err_stop_hw;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100610 }
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800611
612 for (i = 0; i < hdev->maxcollection; ++i) {
613 struct hid_collection *collection = &hdev->collection[i];
614
615 if (collection->type == HID_COLLECTION_PHYSICAL) {
616
617 hsdev = kzalloc(sizeof(*hsdev), GFP_KERNEL);
618 if (!hsdev) {
619 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
620 ret = -ENOMEM;
621 goto err_no_mem;
622 }
623 hsdev->hdev = hdev;
624 hsdev->vendor_id = hdev->vendor;
625 hsdev->product_id = hdev->product;
626 hsdev->start_collection_index = i;
627 if (last_hsdev)
628 last_hsdev->end_collection_index = i;
629 last_hsdev = hsdev;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100630 name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x",
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800631 collection->usage);
Andy Shevchenko5902fde2013-08-14 11:07:09 +0300632 if (name == NULL) {
Axel Linf2f13a62012-09-19 16:30:00 +0100633 hid_err(hdev, "Failed MFD device name\n");
srinivas pandruvada401ca242012-09-05 13:56:00 +0100634 ret = -ENOMEM;
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800635 goto err_no_mem;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100636 }
637 sd->hid_sensor_hub_client_devs[
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800638 sd->hid_sensor_client_cnt].id =
639 PLATFORM_DEVID_AUTO;
Srinivas Pandruvadad81cae82013-12-05 16:34:25 -0800640 sd->hid_sensor_hub_client_devs[
srinivas pandruvada401ca242012-09-05 13:56:00 +0100641 sd->hid_sensor_client_cnt].name = name;
642 sd->hid_sensor_hub_client_devs[
643 sd->hid_sensor_client_cnt].platform_data =
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800644 hsdev;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100645 sd->hid_sensor_hub_client_devs[
646 sd->hid_sensor_client_cnt].pdata_size =
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800647 sizeof(*hsdev);
648 hid_dbg(hdev, "Adding %s:%d\n", name,
649 hsdev->start_collection_index);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100650 sd->hid_sensor_client_cnt++;
651 }
652 }
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800653 if (last_hsdev)
654 last_hsdev->end_collection_index = i;
655
srinivas pandruvada401ca242012-09-05 13:56:00 +0100656 ret = mfd_add_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs,
Stephen Rothwellf45c69b2012-09-12 07:07:00 +0100657 sd->hid_sensor_client_cnt, NULL, 0, NULL);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100658 if (ret < 0)
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800659 goto err_no_mem;
srinivas pandruvada401ca242012-09-05 13:56:00 +0100660
661 return ret;
662
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800663err_no_mem:
664 for (i = 0; i < sd->hid_sensor_client_cnt; ++i) {
srinivas pandruvada401ca242012-09-05 13:56:00 +0100665 kfree(sd->hid_sensor_hub_client_devs[i].name);
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800666 kfree(sd->hid_sensor_hub_client_devs[i].platform_data);
667 }
srinivas pandruvada401ca242012-09-05 13:56:00 +0100668 kfree(sd->hid_sensor_hub_client_devs);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100669err_stop_hw:
670 hid_hw_stop(hdev);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100671
672 return ret;
673}
674
675static void sensor_hub_remove(struct hid_device *hdev)
676{
677 struct sensor_hub_data *data = hid_get_drvdata(hdev);
678 unsigned long flags;
679 int i;
680
681 hid_dbg(hdev, " hardware removed\n");
srinivas pandruvada401ca242012-09-05 13:56:00 +0100682 hid_hw_close(hdev);
Axel Linf2f13a62012-09-19 16:30:00 +0100683 hid_hw_stop(hdev);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100684 spin_lock_irqsave(&data->lock, flags);
685 if (data->pending.status)
686 complete(&data->pending.ready);
687 spin_unlock_irqrestore(&data->lock, flags);
688 mfd_remove_devices(&hdev->dev);
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800689 for (i = 0; i < data->hid_sensor_client_cnt; ++i) {
srinivas pandruvada401ca242012-09-05 13:56:00 +0100690 kfree(data->hid_sensor_hub_client_devs[i].name);
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -0800691 kfree(data->hid_sensor_hub_client_devs[i].platform_data);
692 }
srinivas pandruvada401ca242012-09-05 13:56:00 +0100693 kfree(data->hid_sensor_hub_client_devs);
694 hid_set_drvdata(hdev, NULL);
695 mutex_destroy(&data->mutex);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100696}
697
698static const struct hid_device_id sensor_hub_devices[] = {
Srinivas Pandruvada875e36f2014-01-14 09:30:20 -0800699 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0,
Stephen Chandler Paul30f58872014-04-03 16:27:55 -0400700 USB_DEVICE_ID_INTEL_HID_SENSOR_0),
Srinivas Pandruvada875e36f2014-01-14 09:30:20 -0800701 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
702 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
Stephen Chandler Paul30f58872014-04-03 16:27:55 -0400703 USB_DEVICE_ID_INTEL_HID_SENSOR_0),
704 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
705 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
706 USB_DEVICE_ID_INTEL_HID_SENSOR_1),
Srinivas Pandruvada875e36f2014-01-14 09:30:20 -0800707 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
Archana Patni218eb9e2014-02-03 12:44:16 +0530708 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
709 USB_DEVICE_ID_STM_HID_SENSOR),
710 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
Mika Westerberg0d1e4b02013-02-11 12:31:19 +0200711 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
712 HID_ANY_ID) },
srinivas pandruvada401ca242012-09-05 13:56:00 +0100713 { }
714};
715MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
716
srinivas pandruvada401ca242012-09-05 13:56:00 +0100717static struct hid_driver sensor_hub_driver = {
718 .name = "hid-sensor-hub",
719 .id_table = sensor_hub_devices,
720 .probe = sensor_hub_probe,
721 .remove = sensor_hub_remove,
722 .raw_event = sensor_hub_raw_event,
Srinivas Pandruvada875e36f2014-01-14 09:30:20 -0800723 .report_fixup = sensor_hub_report_fixup,
srinivas pandruvada401ca242012-09-05 13:56:00 +0100724#ifdef CONFIG_PM
725 .suspend = sensor_hub_suspend,
Andy Shevchenko5902fde2013-08-14 11:07:09 +0300726 .resume = sensor_hub_resume,
727 .reset_resume = sensor_hub_reset_resume,
srinivas pandruvada401ca242012-09-05 13:56:00 +0100728#endif
729};
H Hartley Sweetenf4254582012-12-17 15:28:26 -0700730module_hid_driver(sensor_hub_driver);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100731
732MODULE_DESCRIPTION("HID Sensor Hub driver");
733MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
734MODULE_LICENSE("GPL");